The fourteen Sl338c 1971/1972 Primary Sheave component parts are all listed in this schematic.
Parts such as the Primary Sheave: Bolt, Spring Compression810176430100, Pri. Fixed Sheave, Collar are included in the Sl338c 1971/1972 Primary Sheave parts fiche.
The Primary Sheave assembly is constructed from several parts from which the Pri Slidg Sheave is the most expensive.